Function Parameters

Learning Objectives Define a function that accepts multiple parameters. Explain the difference between a parameter and an argument. Call a function using the correct number and order of positional arguments. Create functions with default parameter values to make them more flexible. Override default parameter values by providing a specific argument in a function call. Identify and correct common errors related to function parameters, such as argument mismatch. Ever customized a character in a video game or ordered a specific sandwich at a deli? 🥪 You're already an expert at using parameters! In this lesson, we'll dive deeper into function parameters, the special instructions we give our functions. You'll learn how to make your functions more powerful and flex...

TermDefinitionExample ParameterA special variable listed inside the parentheses in a function definition. It acts as a placeholder for information the function needs to do its job.In `def greet(name):`, `name` is the parameter. ArgumentThe actual value that is sent to the function when it is called. The argument fills the placeholder created by the parameter.In `greet("Alice")`, the string `"Alice"` is the argument. Positional ArgumentsArguments that are passed to a function in a specific order. The first argument corresponds to the first parameter, the second to the second, and so on.If a function is `def draw_shape(shape, color):`, calling it as `draw_shape("circle", "blue")` means `shape` is "circle" and `color` is "blue" beca...

Function Definition Syntax def function_name(parameter1, parameter2, ...): Use the `def` keyword, followed by the function's name, and a list of parameters inside parentheses. The parameters are separated by commas. The line must end with a colon. Default Parameter Syntax def function_name(required_param, optional_param=default_value): To create a default parameter, use the assignment operator (`=`) in the function signature. Parameters with default values must come after parameters without default values. The Order Rule The order of arguments in a function call must match the order of parameters in the function definition. When using positional arguments, the computer doesn't know their names, only their positions. The first value you send goes to the firs...